A person , when_________，can often do what is normally beyond his ability.
| A．challenged | B．challenges |
| C．challenging | D．to challenge |
--Tell me where you live, please.
--I live____________.
| A．in 123 ,King Street | B．at 123 ,King Street |
| C．in King Street, 123 | D．at King Street, 123 |
If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.
A. habit B. law C. rule D. custom
I can't make a decision now. I need _________ more time to think it over.
| A．rather | B．fairly | C．quite | D．lot |
with the size of the whole earth, the highest mountain doesn't seem high at all.
| A．When compared | B．To compare |
| C．While comparing | D．It compared |
He is believed____________ in at his office on his way home.
| A．dropping | B．to have dropped |
| C．having dropped | D．to be dropped |